They give the answers (not solutions) to the odd-numbered problems, which I think is normal for first year texts. Anyway, it's an excellent book, so get it anyway. You shouldn't be bothered getting an old edition that suites your pocket.

EDIT: the newer one is basically the same as the older one I have, just one or two more chapters, space motion and some other wave topic, radiation I think, and some extra notes. I wouldn't be bothered getting the old one I linked above, the omitted chapters are not important.